package cn.pinusdb.jdbc;

public class CRC {
	private static  long[] crc64_tab = new  long [] {
			  0x0000000000000000,0x7ad870c830358979L,
		      0xf5b0e190606b12f2L, 0x8f689158505e9b8bL,
		      0xc038e5739841b68fL, 0xbae095bba8743ff6L,
		      0x358804e3f82aa47dL, 0x4f50742bc81f2d04L,
		      0xab28ecb46814fe75L, 0xd1f09c7c5821770cL,
		      0x5e980d24087fec87L, 0x24407dec384a65feL,
		      0x6b1009c7f05548faL, 0x11c8790fc060c183L,
		      0x9ea0e857903e5a08L, 0xe478989fa00bd371L,
		      0x7d08ff3b88be6f81L, 0x07d08ff3b88be6f8L,
		      0x88b81eabe8d57d73L, 0xf2606e63d8e0f40aL,
		      0xbd301a4810ffd90eL, 0xc7e86a8020ca5077L,
		      0x4880fbd87094cbfcL, 0x32588b1040a14285L,
		      0xd620138fe0aa91f4L, 0xacf86347d09f188dL,
		      0x2390f21f80c18306L, 0x594882d7b0f40a7fL,
		      0x1618f6fc78eb277bL, 0x6cc0863448deae02L,
		      0xe3a8176c18803589L, 0x997067a428b5bcf0L,
		      0xfa11fe77117cdf02L, 0x80c98ebf2149567bL,
		      0x0fa11fe77117cdf0L, 0x75796f2f41224489L,
		      0x3a291b04893d698dL, 0x40f16bccb908e0f4L,
		      0xcf99fa94e9567b7fL, 0xb5418a5cd963f206L,
		      0x513912c379682177L, 0x2be1620b495da80eL,
		      0xa489f35319033385L, 0xde51839b2936bafcL,
		      0x9101f7b0e12997f8L, 0xebd98778d11c1e81L,
		      0x64b116208142850aL, 0x1e6966e8b1770c73L,
		      0x8719014c99c2b083L, 0xfdc17184a9f739faL,
		      0x72a9e0dcf9a9a271L, 0x08719014c99c2b08L,
		      0x4721e43f0183060cL, 0x3df994f731b68f75L,
		      0xb29105af61e814feL, 0xc849756751dd9d87L,
		      0x2c31edf8f1d64ef6L, 0x56e99d30c1e3c78fL,
		      0xd9810c6891bd5c04L, 0xa3597ca0a188d57dL,
		      0xec09088b6997f879L, 0x96d1784359a27100L,
		      0x19b9e91b09fcea8bL, 0x636199d339c963f2L,
		      0xdf7adabd7a6e2d6fL, 0xa5a2aa754a5ba416L,
		      0x2aca3b2d1a053f9dL, 0x50124be52a30b6e4L,
		      0x1f423fcee22f9be0L, 0x659a4f06d21a1299L,
		      0xeaf2de5e82448912L, 0x902aae96b271006bL,
		      0x74523609127ad31aL, 0x0e8a46c1224f5a63L,
		      0x81e2d7997211c1e8L, 0xfb3aa75142244891L,
		      0xb46ad37a8a3b6595L, 0xceb2a3b2ba0eececL,
		      0x41da32eaea507767L, 0x3b024222da65fe1eL,
		      0xa2722586f2d042eeL, 0xd8aa554ec2e5cb97L,
		      0x57c2c41692bb501cL, 0x2d1ab4dea28ed965L,
		      0x624ac0f56a91f461L, 0x1892b03d5aa47d18L,
		      0x97fa21650afae693L, 0xed2251ad3acf6feaL,
		      0x095ac9329ac4bc9bL, 0x7382b9faaaf135e2L,
		      0xfcea28a2faafae69L, 0x8632586aca9a2710L,
		      0xc9622c4102850a14L, 0xb3ba5c8932b0836dL,
		      0x3cd2cdd162ee18e6L, 0x460abd1952db919fL,
		      0x256b24ca6b12f26dL, 0x5fb354025b277b14L,
		      0xd0dbc55a0b79e09fL, 0xaa03b5923b4c69e6L,
		      0xe553c1b9f35344e2L, 0x9f8bb171c366cd9bL,
		      0x10e3202993385610L, 0x6a3b50e1a30ddf69L,
		      0x8e43c87e03060c18L, 0xf49bb8b633338561L,
		      0x7bf329ee636d1eeaL, 0x012b592653589793L,
		      0x4e7b2d0d9b47ba97L, 0x34a35dc5ab7233eeL,
		      0xbbcbcc9dfb2ca865L, 0xc113bc55cb19211cL,
		      0x5863dbf1e3ac9decL, 0x22bbab39d3991495L,
		      0xadd33a6183c78f1eL, 0xd70b4aa9b3f20667L,
		      0x985b3e827bed2b63L, 0xe2834e4a4bd8a21aL,
		      0x6debdf121b863991L, 0x1733afda2bb3b0e8L,
		      0xf34b37458bb86399L, 0x8993478dbb8deae0L,
		      0x06fbd6d5ebd3716bL, 0x7c23a61ddbe6f812L,
		      0x3373d23613f9d516L, 0x49aba2fe23cc5c6fL,
		      0xc6c333a67392c7e4L, 0xbc1b436e43a74e9dL,
		      0x95ac9329ac4bc9b5L, 0xef74e3e19c7e40ccL,
		      0x601c72b9cc20db47L, 0x1ac40271fc15523eL,
		      0x5594765a340a7f3aL, 0x2f4c0692043ff643L,
		      0xa02497ca54616dc8L, 0xdafce7026454e4b1L,
		      0x3e847f9dc45f37c0L, 0x445c0f55f46abeb9L,
		      0xcb349e0da4342532L, 0xb1eceec59401ac4bL,
		      0xfebc9aee5c1e814fL, 0x8464ea266c2b0836L,
		      0x0b0c7b7e3c7593bdL, 0x71d40bb60c401ac4L,
		      0xe8a46c1224f5a634L, 0x927c1cda14c02f4dL,
		      0x1d148d82449eb4c6L, 0x67ccfd4a74ab3dbfL,
		      0x289c8961bcb410bbL, 0x5244f9a98c8199c2L,
		      0xdd2c68f1dcdf0249L, 0xa7f41839ecea8b30L,
		      0x438c80a64ce15841L, 0x3954f06e7cd4d138L,
		      0xb63c61362c8a4ab3L, 0xcce411fe1cbfc3caL,
		      0x83b465d5d4a0eeceL, 0xf96c151de49567b7L,
		      0x76048445b4cbfc3cL, 0x0cdcf48d84fe7545L,
		      0x6fbd6d5ebd3716b7L, 0x15651d968d029fceL,
		      0x9a0d8ccedd5c0445L, 0xe0d5fc06ed698d3cL,
		      0xaf85882d2576a038L, 0xd55df8e515432941L,
		      0x5a3569bd451db2caL, 0x20ed197575283bb3L,
		      0xc49581ead523e8c2L, 0xbe4df122e51661bbL,
		      0x3125607ab548fa30L, 0x4bfd10b2857d7349L,
		      0x04ad64994d625e4dL, 0x7e7514517d57d734L,
		      0xf11d85092d094cbfL, 0x8bc5f5c11d3cc5c6L,
		      0x12b5926535897936L, 0x686de2ad05bcf04fL,
		      0xe70573f555e26bc4L, 0x9ddd033d65d7e2bdL,
		      0xd28d7716adc8cfb9L, 0xa85507de9dfd46c0L,
		      0x273d9686cda3dd4bL, 0x5de5e64efd965432L,
		      0xb99d7ed15d9d8743L, 0xc3450e196da80e3aL,
		      0x4c2d9f413df695b1L, 0x36f5ef890dc31cc8L,
		      0x79a59ba2c5dc31ccL, 0x037deb6af5e9b8b5L,
		      0x8c157a32a5b7233eL, 0xf6cd0afa9582aa47L,
		      0x4ad64994d625e4daL, 0x300e395ce6106da3L,
		      0xbf66a804b64ef628L, 0xc5bed8cc867b7f51L,
		      0x8aeeace74e645255L, 0xf036dc2f7e51db2cL,
		      0x7f5e4d772e0f40a7L, 0x05863dbf1e3ac9deL,
		      0xe1fea520be311aafL, 0x9b26d5e88e0493d6L,
		      0x144e44b0de5a085dL, 0x6e963478ee6f8124L,
		      0x21c640532670ac20L, 0x5b1e309b16452559L,
		      0xd476a1c3461bbed2L, 0xaeaed10b762e37abL,
		      0x37deb6af5e9b8b5bL, 0x4d06c6676eae0222L,
		      0xc26e573f3ef099a9L, 0xb8b627f70ec510d0L,
		      0xf7e653dcc6da3dd4L, 0x8d3e2314f6efb4adL,
		      0x0256b24ca6b12f26L, 0x788ec2849684a65fL,
		      0x9cf65a1b368f752eL, 0xe62e2ad306bafc57L,
		      0x6946bb8b56e467dcL, 0x139ecb4366d1eea5L,
		      0x5ccebf68aecec3a1L, 0x2616cfa09efb4ad8L,
		      0xa97e5ef8cea5d153L, 0xd3a62e30fe90582aL,
		      0xb0c7b7e3c7593bd8L, 0xca1fc72bf76cb2a1L,
		      0x45775673a732292aL, 0x3faf26bb9707a053L,
		      0x70ff52905f188d57L, 0x0a2722586f2d042eL,
		      0x854fb3003f739fa5L, 0xff97c3c80f4616dcL,
		      0x1bef5b57af4dc5adL, 0x61372b9f9f784cd4L,
		      0xee5fbac7cf26d75fL, 0x9487ca0fff135e26L,
		      0xdbd7be24370c7322L, 0xa10fceec0739fa5bL,
		      0x2e675fb4576761d0L, 0x54bf2f7c6752e8a9L,
		      0xcdcf48d84fe75459L, 0xb71738107fd2dd20L,
		      0x387fa9482f8c46abL, 0x42a7d9801fb9cfd2L,
		      0x0df7adabd7a6e2d6L, 0x772fdd63e7936bafL,
		      0xf8474c3bb7cdf024L, 0x829f3cf387f8795dL,
		      0x66e7a46c27f3aa2cL, 0x1c3fd4a417c62355L,
		      0x935745fc4798b8deL, 0xe98f353477ad31a7L,
		      0xa6df411fbfb21ca3L, 0xdc0731d78f8795daL,
		      0x536fa08fdfd90e51L, 0x29b7d047efec8728L,
	};
	public static long crc64(byte[] buf){
		return crc64(buf,0,buf.length);
	}
	
	public static long crc64( byte[] buf, int offset,int len ) {
		long crc = 0;
		for(int i = offset;i<buf.length&&i<(offset+len);i++){
			int t=((byte)crc ^ buf[i]) & 0xff;
			crc = crc64_tab[t] ^ (crc >>> 8);
			
		}
		return crc;
	}
	public static int crc32(byte[] buf,int offset,int len) {
		long crc64code = crc64(buf,offset,len);
		return (int)(crc64code & 0xFFFFFFFF);
	}
	
}
